Hi James, great effort I hope you enjoyed running in Majorca, Serra de Tramuntana is a great place for trail running.
However, I don’t understand why you claimed that was the GR221 FKT. Are you able to assure that you followed the GR221 route? Because I’m not, there are too many variants.
Why did you go through the Pla des Pouet after Valldemossa? Why did you choose the Pas Llis variant instead of going through the Coll des Coloms? Why stopping at Puerto Pollença instead of Formentor?
Did you get advice from locals for this? As a local, I'd have chosen a different one.
From my point of view, you took a route/variant than no one (that I’m aware of) has run before and claimed that was the GR221 FKT. Just to add some perspective, Tofol Castanyer ran the 80% of that (107km) in less than 11 hours (former Ultra Serra de Tramuntana). Beating that time/variant would make more sense if you were looking for a FKT, at least it’s more measurable.
But yeah, you were probably the first and fastest running that specific route.

Fran Moreno thanks for taking time to comment. The whole FKT concept is a bit of a minefield (just take a look at the Trans America footrace) and you are correct to question my route. TBH I simply couldn't find a verified route from one side of the island to the other. They may well exist but I do have one on SPOT and GPX. I'd agree the route was at times not the most direct and a disputed area and a few wrong turns saw me cover more distance than was planned. I'm honesty this wasn't a project about setting an unbeatable time, it was more an exercise in running along technical trails on an island I love. Could I have done a better faster route? Sure.